M81 and Ultraluminous X-Ray source Holmberg IX X-1, H-Alpha only (Albert van Duin)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Bode's Galaxy · ES UMa · HD85458 · M 81 · NGC 3031 · PGC 2724146 · PGC 2726822 · PGC 28505 · PGC 28529 · PGC 28757 · PGC 28848

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M81 and Ultraluminous X-Ray source Holmberg IX X-1, H-Alpha only

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M81 and Ultraluminous X-Ray source Holmberg IX X-1, H-Alpha only

Due to the prominent moonlight the last two nights, I started a run with H-Alpha only on M81.
A lot of detail is visible, including an annular shaped nebula just left of Holmberg-1 (PGC28757), the fuzzy cloud just left of M81. There is little H-Alpha light coming from this satellite galaxy.
Coming night I will try to acquire 8 hours more data.

I was able to collect another 24 x 1200s and added it to version B.

The annular shaped nebula seems to be: Ultraluminous X-Ray source Holmberg IX X-1 !
Revision C shows the Astrobin Plate Solve of this object.
You can also see the object in my colour version:

Full image can be found here

The coordinates correspond with those in an article I found online

Original
B
C
Final
D

B

Description: added another 24 frames of 1200s each.

Uploaded: ...

C

Title: Position of Ultraluminous X-Ray source Holmberg IX X-1

Description: This is a screenshot with the X-Ray source at the crosshair

Uploaded: ...

D

Description: Sharpened with BlurXterminator

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	9705939
PixInsight job	16GG3SQIAULDL77MH774UUOPQYXPPZJ0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h55m36s.817
RA (top/left)	10h00m24s.372
RA (top/right)	09h50m59s.366
RA (bottom/right)	09h50m57s.286
RA (bottom/left)	10h00m05s.889

Dec (center)	+69°04′11″.91
Dec (top/left)	+69°23′04″.32
Dec (top/right)	+69°24′15″.48
Dec (bottom/right)	+68°44′48″.72
Dec (bottom/left)	+68°43′40″.40

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M81 and Ultraluminous X-Ray source Holmberg IX X-1, H-Alpha only

M81 and Ultraluminous X-Ray source Holmberg IX X-1, H-Alpha only

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M81 and Ultraluminous X-Ray source Holmberg IX X-1, H-Alpha only

M81 and Ultraluminous X-Ray source Holmberg IX X-1, H-Alpha only

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D

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